JPG Compress 20KB — Photo and Image Online (India Guide)
Tool: Image Compressor to 20KB
Twenty kilobytes is small enough that every step before compression matters more than the compression itself. I built the 20KB preset because government and exam portals in India still enforce it — especially on signature fields — and because the support emails all sounded the same: "It says under 20KB but won't accept."
This is the workflow I send back. For why rejections happen when size is already correct, read Why 20KB photos get rejected.
Minute 0–2: Read the form literally
Before opening any tool, copy these lines from the upload page into Notes:
- Maximum file size (20KB? below 20KB?)
- Required format (JPG/JPEG almost always)
- Width × height in pixels if shown
- Which field — photo, signature, or thumb impression
SSC, state PSC, and railway forms often put 20KB on signatures and a higher cap on photos in the same application. Compressing both to 20KB is a common mistake.
Minute 2–8: Prepare the source JPG
For signatures
- Black or dark blue pen on white paper — no ruled lines visible if avoidable.
- Photograph flat, phone parallel to paper, even light.
- Crop so ink fills ~70% of frame width; thin white margin on all sides.
- Export as JPG if your editor saved PNG.
For photos (only when the field cap is actually 20KB)
- Plain background, face straight to camera.
- Crop passport-style — head and shoulders only.
- If the same form allows 50KB or 100KB on the photo field, use that instead.
Minute 8–10: Compress once
- Upload cropped original — not a previous attempt.
- Download output.
- File properties: size ≤ 20KB (strict portals reject 21KB).
- Full zoom: ink strokes continuous for signatures; eyes identifiable for photos.
If rejected, check format and pixels before re-compressing. See rejection guide above.
Minute 10–12: Upload and verify preview
- Photo in photo slot, signature in signature slot.
- Portal preview not stretched or blank.
- Save confirmation PDF or screenshot until admit card generates.
Portal patterns (India, 2026)
| Form family | 20KB typical use | Photo cap (often higher) |
|---|---|---|
| SSC / CHSL | Signature | 20–50KB photo — read notice |
| Railway RRB | Signature | ~50KB photo |
| State TET / PSC | Signature or thumb | 50–100KB photo |
| Scholarship (older portals) | Both photo and sig at 20KB | rare — verify PDF |
When photo and signature share 20KB, prepare them with different crops — never the same file twice.
Format path to 20KB JPG
| You have | Do this |
|---|---|
| Camera JPG | Crop → 20KB tool |
| PNG scan | PNG to JPG → crop → 20KB |
| WEBP | WEBP to JPG → crop → 20KB |
| PDF scan of signature | Export page as JPG first, then crop |
Troubleshooting without panic
File 18KB, still rejected
→ Wrong format (PNG extension), wrong dimensions, or corrupted upload. Re-export JPG, match pixels, try different browser.
Signature looks grey after 20KB
→ Retake with darker pen and tighter crop. Compression cannot darken faint ink.
Photo looks like a mosaic at 20KB
→ Field may allow more than 20KB. Re-read the form. Switch to 50KB or 100KB if allowed.
Compressed twice, looks worse
→ Stop. Original only, one pass.
Related tools on ImageFormatConverter.in
- Compress Image to 50KB — photo fields on same form
- Resize Signature to 50KB — when signature cap is 50KB not 20KB
- Passport Size Photo Maker — photo framing
- Custom Image Compressor — odd limits like 15KB or 30KB
— Rajat Gupta